Kligat writes: Researchers working to recreate the sounds of ancient Aztec and Mayan instruments have blown into a clay, skull-shaped "whistle of death" for the first time. Discovered in each hand of a human skeleton in an Aztec temple, mechanical engineer Roberto Velazquez believes they were used during Aztec sacrifices to the gods. Velaquez has created countless replicas of pre-Columbian instruments and experimented in how one was intended to play them.
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